ASHRAE 62.1 通风与能量回收

AASHRAE 62.1-2022 sets the minimum ventilation rates for acceptable indoor air quality, and its requirements directly drive how much outdoor air — and therefore how much recoverable energy — a system must handle. Energy recovery is the bridge between good ventilation and reasonable energy bills.

The Ventilation Rate Procedure

第 6.2 节采用通风率计算程序。某空间的新风需求为：

V_bz = R_p × P + R_a × A

其中 R_p 为人均新风量，R_a 为单位面积指标，P 为人数，A 为地面面积。表 6.2.2.1 列出了 R_p 和 R_a 针对每种占用类型。较高的 R_p 的空间（教室、体育馆、实验室）会将新风占比推高至触发以下条件的 70% 阈值： ASHRAE 90.1 的回收强制要求.

Why Recovery Pairs with 62.1

• 更多新风意味着更多的供热与供冷负荷。 膜式能量回收通风机 或转轮将其中大部分能量返回到进风气流中。
• 62.1 要求通风不得造成加压问题。借助回收芯体的平衡式送排风可使建筑保持接近中性压力。
• 在关键空间中，隔离至关重要：实验室及 洁净室 优先选用无交叉污染的膜式芯体，而非旋转转轮。

Local Exhaust and Makeup Air

When a space has local exhaust (fume hoods, kitchens), 62.1 requires matching makeup air. That makeup air is a prime recovery candidate — but check the 90.1 exceptions for hazardous and grease exhaust before specifying a wheel.

Practical Sizing

从 62.1 的费率开始，然后运行以下 AHU 选型计算 以及 AHU 组件 回收芯体位于气流中的布置。先对回收装置选型，可让您根据以下负荷正确确定冷却盘管和加热盘管的尺寸： 回收的 负荷，通常可省下一级设备规格。

常见问题

How does ASHRAE 62.1 drive energy recovery?
Its ventilation rates set how much outdoor air a system must condition, and that outdoor air is the recoverable energy a wheel or membrane can reclaim.

What is the Ventilation Rate Procedure?
A method using per-person and per-area outdoor-air rates multiplied by occupants and floor area to set the space requirement.

How does 62.1 relate to 90.1 recovery mandates?
High outdoor-air fractions from 62.1 can push a system above the 70% threshold that triggers 90.1's recovery requirement.

Why size recovery before the coil?
Sizing the core first lets the cooling and heating coils be right-sized on the recovered load, often saving an equipment size.

常见问题

How does ASHRAE 62.1 drive energy recovery?

Its ventilation rates set how much outdoor air a system must condition, and that outdoor air is the recoverable energy a wheel or membrane can reclaim.

What is the Ventilation Rate Procedure?

A method using per-person and per-area outdoor-air rates multiplied by occupants and floor area to set the space requirement.

How does 62.1 relate to 90.1 recovery mandates?

High outdoor-air fractions from 62.1 can push a system above the 70% threshold that triggers 90.1's recovery requirement.

Why size recovery before the coil?

Sizing the core first lets the cooling and heating coils be right-sized on the recovered load, often saving an equipment size.